A copper-clad laminate including at least one of a copper layer having a roughened surface is disclosed. The copper-clad laminate is obtained by roughening at least one surface of a base copper layer so as to have a low profile comprising a copper layer having a thickness of from 5 μm to 70 μm and a resin layer on the copper layer, wherein a peeling strength between the copper layer and the resin layer is more than 0.6 N/mm when the thickness of the copper layer is more than 5 μm, wherein a ten-point mean roughness Sz of the roughened surface is lower than that of the base copper layer.

To provide a decorative sheet including a transparent resin layer having high transparency and excellent surface scratch resistance from the viewpoint of the design properties and a transparent resin sheet. A decorative sheet (1) according to one aspect of the present invention has a transparent resin layer (4) containing a crystalline polypropylene resin as the main component, in which a value of a peak area ratio x represented by the following expression (1) of the transparent resin layer (4) is x≥0.4. Herein, S040, S130, and Sam in the following expression (1) are peak areas determined from an X-ray diffraction spectrum obtained by measuring the transparent resin layer with an X-ray diffractometer, S040 is the peak area from the Miller index (040) of polypropylene α crystals, S130 is the peak area from the Miller index (130) of the polypropylene α crystals, and Sam is the peak area of an amorphous material. $\begin{array}{cc}\mathrm{Peak}\mathrm{area}\mathrm{ratio}x=\frac{\left(S040+S130\right)}{\left(\mathrm{Sam}\right)}& \left(1\right)\end{array}$

To provide a decorative sheet including a transparent resin layer having high transparency and excellent surface scratch resistance from the viewpoint of the design properties and a transparent resin sheet. A decorative sheet (1) according to one aspect of the present invention has a transparent resin layer (4) containing a crystalline polypropylene resin as the main component, in which a value of a peak area ratio x represented by the following expression (1) of the transparent resin layer (4) is x≥0.4. Herein, S040, S130, and Sam in the following expression (1) are peak areas determined from an X-ray diffraction spectrum obtained by measuring the transparent resin layer with an X-ray diffractometer, S040 is the peak area from the Miller index (040) of polypropylene α crystals, S130 is the peak area from the Miller index (130) of the polypropylene α crystals, and Sam is the peak area of an amorphous material. $\begin{array}{cc}\mathrm{Peak}\mathrm{area}\mathrm{ratio}x=\frac{\left(S040+S130\right)}{\left(\mathrm{Sam}\right)}& \left(1\right)\end{array}$

A thermoplastic polymer-based composite material and a preparation method thereof are provided. The thermoplastic polymer-based composite material is obtained by impregnating a reinforcing material with a mixture or an oligomer of an epoxy resin, a bisphenol A/F, and a catalyst and then performing an in-situ polymerization. The thermoplastic polymer-based composite material is less expensive to produce, has an optimal impregnation effect, excellent secondary processing performance, high heat resistance, desirable mechanical properties and excellent overall performance.

According to one aspect of the invention, a resin composition for use as an adhesive member in a display device includes: a first (meth)acrylic resin having a weight average molecular weight of about 10,000 to about 40,000; two or more second (meth)acrylic resins having a molecular weight of about 100 to about 250 and differing from one another; and two or more different photoinitiators.

Embodiments disclosed herein relate to composite laminate structures including a polymer layer having sp.sup.2 carbon-containing material and improved heat release properties, and methods of making the same.

To provide a laminate excellent in alkali resistance and interlaminate bonding at high temperature, and a laminate.

A method for producing a laminate, which comprises producing a laminate having a layer of a first composition containing a copolymer having fluorine atoms and a layer of a second composition containing a non-fluorinated polymer; and

reacting the first composition and the second composition to produce a laminate having a first crosslinked layer formed of the first composition and a second crosslinked layer formed of a crosslinked product of the second composition,

wherein the absolute value of the difference between the SP value of the first composition and the SP value of the second composition is from 0 to 3.0 (J/cm.sup.3).sup.1/2.

To provide a laminate excellent in alkali resistance and interlaminate bonding at high temperature, and a laminate.

A method for producing a laminate, which comprises producing a laminate having a layer of a first composition containing a copolymer having fluorine atoms and a layer of a second composition containing a non-fluorinated polymer; and

reacting the first composition and the second composition to produce a laminate having a first crosslinked layer formed of the first composition and a second crosslinked layer formed of a crosslinked product of the second composition,

wherein the absolute value of the difference between the SP value of the first composition and the SP value of the second composition is from 0 to 3.0 (J/cm.sup.3).sup.1/2.

Disclosed is a bionic fiber-reinforced composite material with high impact resistance and a preparation method thereof. Bionic fiber composite material is composed of positive and negative spiral fiber resin layers, which are alternately laid in a particular proportion and then heated and cured under pressure. The positive and negative spiral fiber resin layers are non-coaxial and uniformly rotated and stacked along their respective central axes periodically. The bionic fiber resin layer is formed by infiltrating a structurally bionic fiber material with a modified resin. The bionic structures include a scorpion claw structure, a jaw foot structure of mantis shrimp and a combined structure in the horn sheath of small tail Han sheep and pheasant feathers. Significantly, bionic fiber-reinforced composite material effectively improves the impact resistance and interlayer toughness of the fiber composite material by undergoing the combinatorial bionics of the structure of fiber material and the layering method.

Disclosed is a bionic fiber-reinforced composite material with high impact resistance and a preparation method thereof. Bionic fiber composite material is composed of positive and negative spiral fiber resin layers, which are alternately laid in a particular proportion and then heated and cured under pressure. The positive and negative spiral fiber resin layers are non-coaxial and uniformly rotated and stacked along their respective central axes periodically. The bionic fiber resin layer is formed by infiltrating a structurally bionic fiber material with a modified resin. The bionic structures include a scorpion claw structure, a jaw foot structure of mantis shrimp and a combined structure in the horn sheath of small tail Han sheep and pheasant feathers. Significantly, bionic fiber-reinforced composite material effectively improves the impact resistance and interlayer toughness of the fiber composite material by undergoing the combinatorial bionics of the structure of fiber material and the layering method.